Exhibit 99.1

StoneBridge Acquisition II Corporation

INDEX TO FINANCIAL STATEMENT

		Page
Financial Statement of StoneBridge Acquisition II Corporation:
Report of Independent Registered Public Accounting Firm		F-2
Balance Sheet as of October 1, 2025		F-3
Notes to Financial Statement		F-4

F-1

Report of Independent Registered Public Accounting Firm

To the Board of Directors and Shareholders of

StoneBridge Acquisition II Corporation

Opinion on the Financial Statement

We have audited the accompanying balance sheet of StoneBridge Acquisition II Corporation (the “Company”), as of October 1, 2025, and the related notes (collectively referred to as the “financial statement”). In our opinion, the financial statement presents fairly, in all material respects, the financial position of the Company as of October 1, 2025, in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

The financial statement is the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statement based on our audit. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required to be independent with respect to the Company in accordance with the U.S federal securities laws and the applicable rules and regulators of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statement is free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audit, we are required to obtain an understanding of internal control over financial reporting, but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audit included performing procedures to assess the risks of material misstatement of the financial statement, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statement. Our audit also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statement. We believe that our audit provides a reasonable basis for our opinion.

We have served as the Company’s auditor since 2025.

Atlanta, Georgia

October 7, 2025

F-2

STONEBRIDGE ACQUISITION II CORPORATION
BALANCE SHEET
OCTOBER 1, 2025

Assets
Current Assets
Cash	$	1,015,302
Prepaid expenses		97,946
Total current assets		1,113,248
Investments held in Trust Account		57,500,000
Total Assets	$	58,613,248

Liabilities, Ordinary Shares Subject to Possible Redemption, and Shareholders’ Equity
Current Liabilities
Accrued offering expenses	$	240,600
Accrued expenses		129,188
Due to Sponsor		10,783
Total current liabilities		380,571

Commitments and Contingencies (Note 6)
Class A ordinary shares subject to possible redemption, 5,750,000 shares at redemption value of $10.00 per share		57,500,000

Shareholders’ Equity
Preference shares, $0.0001 par value; 1,000,000 shares authorized; none issued or outstanding		-
Class A ordinary shares, $0.0001 par value; 200,000,000 shares authorized; 230,000 shares issued or outstanding (excluding 5,750,000 shares subject to possible redemption)		23
Class B ordinary shares, $0.0001 par value; 20,000,000 shares authorized; 2,070,417 shares issued and outstanding (1)		207
Additional paid-in capital		798,390
Accumulated deficit		(65,943	)
Total Shareholders’ Equity		732,677
Total Liabilities, Ordinary Shares Subject to Possible Redemption, and Shareholders’ Equity	$	58,613,248

(1)	On October 1, 2025, the underwriters exercised their over-allotment option in full as part of the closing of the Initial Public Offering. As such, the 250,000 Founder Shares are no longer subject to forfeiture (Note 5).

The accompanying notes are an integral part of the financial statement.

F-3

STONEBRIDGE ACQUISITION II CORPORATION
NOTES TO FINANCIAL STATEMENT
OCTOBER 1, 2025

Note 1 — Organization and Business Operations

StoneBridge Acquisition II Corporation (the “Company”) is a blank check company incorporated as a Cayman Islands exempted corporation on June 19, 2024. The Company was incorporated for the purpose of effecting a merger, amalgamation, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses (“Business Combination”). The Company has not selected any Business Combination target and it has not, nor has anyone on its behalf, initiated any substantive discussions, directly or indirectly, with any Business Combination target with respect to the Business Combination.

The Company is not limited to a particular industry or geographic region for purposes of completing a Business Combination. The Company is an early stage and emerging growth company and, as such, the Company is subject to all of the risks associated with early stage and emerging growth companies. The Company will generate non-operating income in the form of interest income from the proceeds derived from the Initial Public Offering. The Company has selected December 31 as its fiscal year end.

As of October 1, 2025, the Company had not yet commenced operations. The registration statement for the Company’s Initial Public Offering was declared effective on September 30, 2025. On October 1, 2025, the Company consummated the Initial Public Offering of 5,750,000 units (the “Units” and, with respect to the Class A ordinary shares included in the Units being offered, the “Public Shares”), which includes the full exercise by the underwriters of their over-allotment option in the amount of 750,000 Units, at $10.00 per Unit, generating gross proceeds of $57,500,000. Each Unit consists of one ordinary share, $0.0001 par value per share, and one right to receive of one- tenth (1/10) of one Class A ordinary share upon the completion of the initial Business Combination.

Simultaneously with the consummation of the IPO and exercise of over-allotment option, the Company consummated the private placement (“Private Placement”) of 153,750 units (the “Initial Private Placement Units”) to the Sponsor and and certain institutional investors, at a price of $10.00 per Initial Private Placement Unit, generating total proceeds of $1,537,500, which is described in Note 4.

Transaction costs amounted to $3,063,880 consisting of $287,500 of underwriting commissions which was paid in cash at the closing date of the IPO, $2,300,000 of the Representative Shares (discussed in the below), and $476,380 of other offering costs.

In conjunction with the IPO and exercise of over-allotment option, the Company issued to the underwriter 230,000 Class A ordinary shares for no consideration (the “Representative Shares”). The fair value of the Representative Shares accounted for as compensation under Accounting Standards Codification (“ASC”) 718, “Compensation – Stock Compensation” (“ASC 718”) is included in the offering costs.

The Company’s management has broad discretion with respect to the specific application of the net proceeds of the IPO and the Private Placement Units, although substantially all of the net proceeds are intended to be applied generally toward consummating a Business Combination. There is no assurance that the Company will be able to complete a business combination successfully.

The Company’s Business Combination must be with one or more target businesses that together have a fair market value equal to at least 80% of the net balance in the Trust Account (as defined below) (net of amounts disbursed to management for working capital purposes, if permitted, and excluding the amount of any deferred underwriting discount held in trust) at the time of the signing an agreement to enter into a Business Combination. The board of directors will make the determination as to the fair market value of the initial business combination. If the board of directors is not able to independently determine the fair market value of the initial Business Combination, the Company will obtain an opinion from an independent investment banking firm or another independent entity that commonly renders valuation opinions with respect to the satisfaction of such criteria. There is no assurance that the Company will be able to successfully effect a Business Combination.

F-4

Following the closing of the Initial Public Offering, on October 1, 2025, an amount of $57,500,000 ($10.00 per Unit) from the net proceeds of the sale of the Units and the Private Placement Units was placed in a Trust Account (the “Trust Account”) and will be invested only in U.S. government treasury obligations with a maturity of 185 days or less or in money market funds meeting certain conditions under Rule 2a-7 under the Investment Company Act which invest only in direct U.S. government treasury obligations; the holding of these assets in this form is intended to be temporary and for the sole purpose of facilitating the intended Business Combination. To mitigate the risk that the Company might be deemed to be an investment company for purposes of the Investment Company Act, which risk increases the longer that the Company holds investments in the Trust Account, the Company may, at any time (based on the management team’s ongoing assessment of all factors related to the Company’s potential status under the Investment Company Act), instruct the trustee to liquidate the investments held in the Trust Account and instead to hold the funds in the Trust Account in cash or in an interest bearing demand deposit account at a bank. Except with respect to interest earned on the funds held in the Trust Account that may be released to the Company to pay its taxes, if any, the proceeds from the Initial Public Offering and the sale of the Private Placement Units will not be released from the Trust Account until the earliest of (i) the completion of the Company’s initial Business Combination, (ii) the redemption of the Company’s public shares (as defined below) if the Company is unable to complete the initial Business Combination within 18 months from the closing of the Initial Public Offering or by such earlier liquidation date as the Company’s board of directors may approve (the “Completion Window”), subject to applicable law, or (iii) the redemption of the Company’s public shares properly submitted in connection with a shareholder vote to amend the Company’s amended and restated memorandum and articles of association to (A) modify the substance or timing of the Company’s obligation to allow redemption in connection with the initial Business Combination or to redeem 100% of the Company’s public shares if the Company has not consummated an initial Business Combination within the Completion Window or (B) with respect to any other material provisions relating to the rights of holders of ordinary shares or pre-initial Business Combination activity. The proceeds deposited in the Trust Account could become subject to the claims of the Company’s creditors, if any, which could have priority over the claims of the Company’s public shareholders.

The Company will provide the Company’s public shareholders with the opportunity to redeem all or a portion of their public shares upon the completion of the initial Business Combination either (i) in connection with a general meeting called to approve the initial Business Combination or (ii) by means of a tender offer. The decision as to whether the Company will seek shareholder approval of a proposed initial Business Combination or conduct a tender offer will be made by the Company, solely in its discretion. The public shareholders will be entitled to redeem their shares at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account calculated as of two business days prior to the consummation of the initial Business Combination, including interest earned on the funds held in the Trust Account (less taxes payable), divided by the number of then outstanding public shares, subject to the limitations. The amount in the Trust Account is initially anticipated to be $10.00 per public share.

The ordinary shares subject to redemption were recorded at a redemption value and classified as temporary equity upon the completion of the Initial Public Offering, in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 480, “Distinguishing Liabilities from Equity.”

If the Company is unable to complete its initial Business Combination within the Completion Window, the Company will as promptly as reasonably possible but not more than ten business days thereafter, redeem the public shares, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including interest earned on the funds held in the Trust Account (less taxes payable and up to $100,000 of interest to pay liquidation and dissolution expenses), divided by the number of then outstanding public shares, which redemption will constitute full and complete payment for the public shares and completely extinguish public shareholders’ rights as shareholders (including the right to receive further liquidation or other distributions, if any), subject to the Company’s obligations under Cayman Islands law to provide for claims of creditors and subject to the other requirements of applicable law.

F-5

The Sponsor, officers and directors have entered into a letter agreement with the Company, pursuant to which they have agreed to (i) waive their redemption rights with respect to their founder shares, private placement shares and public shares in connection with the completion of the initial business combination; (ii) waive their redemption rights with respect to their founder shares, private placement shares and public shares in connection with a shareholder vote to approve an amendment to the Company’s amended and restated memorandum and articles of association (A) to modify the substance or timing of the obligation to allow redemption in connection with the initial business combination or to redeem 100% of the public shares if the Company has not consummated an initial business combination within 18 months or (B) with respect to any other material provisions relating to shareholders’ rights or pre-initial business combination activity; (iii) waive their rights to liquidating distributions from the Trust Account with respect to their Founder Shares or private placement shares if the Company fails to complete the initial Business Combination within 18 months, although they will be entitled to liquidating distributions from the Trust Account with respect to any public shares they hold if the Company fails to complete the initial Business Combination within such time period and to liquidating distributions from assets outside the Trust Account; and (iv) vote any Founder Shares and private placement shares held by them and any public shares purchased during or after this offering (including in open market and privately negotiated transactions, aside from shares they may purchase in compliance with the requirements of Rule 14e-5 under the Exchange Act, which would not be voted in favor of approving the Business Combination transaction) in favor of the initial Business Combination.

The Company’s Sponsor has agreed that it will be liable to the Company if and to the extent any claims by a third party for services rendered or products sold to the Company (except for the Company’s independent auditors), or a prospective target business with which the Company has entered into a written letter of intent, confidentiality or other similar agreement or Business Combination agreement, reduce the amount of funds in the Trust Account to below the lesser of (i) $10 per public share and (ii) the actual amount per public share held in the Trust Account as of the date of the liquidation of the Trust Account, if less than $10 per share due to reductions in the value of the trust assets, less taxes payable, provided that such liability will not apply to any claims by a third party or prospective target business who executed a waiver of any and all rights to the monies held in the Trust Account (whether or not such waiver is enforceable) nor will it apply to any claims under the Company’s indemnity of the underwriter of the Initial Public Offering against certain liabilities, including liabilities under the Securities Act of 1933, as amended (the “Securities Act”). However, the Company has not asked the Sponsor to reserve for such indemnification obligations, nor has the Company independently verified whether the Sponsor has sufficient funds to satisfy its indemnity obligations and the Company believes that the Sponsor’s only assets are securities of the Company. Therefore, the Company cannot assure that the Sponsor would be able to satisfy those obligations.

Note 2 — Significant Accounting Policies

Basis of Presentation

The accompanying financial statement is presented in conformity with accounting principles generally accepted in the United States of America (“US GAAP”) and pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”).

Liquidity and Capital Resources

As of October 1, 2025, the Company had $1,015,302 in cash. Further, the Company has incurred and expects to continue to incur significant costs in pursuit of its financing and acquisition plans. In connection with the Company’s assessment of going concern considerations in accordance with ASC 205-40, “Presentation of Financial Statements-Going Concern,” as of October 1, 2025, the Company believes that it has sufficient funds for the working capital needs of the Company until a minimum of one year from the date of issuance of this financial statement. The Company cannot ensure that its plans to consummate an initial Business Combination, or to raise additional capital, if necessary, will be successful.

Emerging Growth Company Status

The Company is an “emerging growth company,” as defined in Section 2(a) of the Securities Act, as modified by the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”), and it may take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not emerging growth companies including, but not limited to, not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act, reduced disclosure obligations regarding executive compensation in its periodic reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and shareholder approval of any golden parachute payments not previously approved.

F-6

Further, Section 102(b)(1) of the JOBS Act exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that an emerging growth company can elect to opt out of the extended transition period and comply with the requirements that apply to non-emerging growth companies but any such election to opt out is irrevocable. The Company has elected not to opt out of such extended transition period which means that when a standard is issued or revised and it has different application dates for public or private companies, the Company, as an emerging growth company, can adopt the new or revised standard at the time private companies adopt the new or revised standard. This may make comparison of the Company’s financial statement with another public company which is neither an emerging growth company nor an emerging growth company which has opted out of using the extended transition period difficult or impossible because of the potential differences in accounting standards used.

Use of Estimates

The preparation of the financial statement in conformity with US GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statement. Making estimates requires management to exercise significant judgment. It is at least reasonably possible that the estimate of the effect of a condition, situation or set of circumstances that existed at the date of the financial statements which management considered in formulating its estimate, could change in the near term due to one or more future confirming events. Actual results could differ from those estimates.

Cash and Cash Equivalents

The Company considers all short-term investments with an original maturity of three months or less when purchased to be cash equivalents. The Company had $1,015,302 cash and no cash equivalents as of October 1, 2025.

Investments Held in Trust Account

As of October 1, 2025, the assets held in the Trust Account, amounting to $57,500,000, were held in money market funds investing in U.S. government securities, within the meaning set forth in Section 2(a)(16) of the Investment Company Act, with a maturity of 185 days or less, or investments in money market funds that invest in U.S. government securities and generally have a readily determinable fair value, or a combination thereof. Such investments are classified as trading securities which are presented at fair value. The estimated fair values of investments held in the Trust Account are determined using available market information.

Concentration of Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist of a cash account in a financial institution, which, at times, may exceed the Federal Deposit Insurance Corporation coverage limit of $250,000. Any loss incurred or a lack of access to such funds could have a significant adverse impact on the Company’s financial condition, results of operations, and cash flows.

Offering Costs

The Company complies with the requirements of the ASC 340-10-S99 and SEC Staff Accounting Bulletin (“SAB”) Topic 5A, “Expenses of Offering.” Offering costs consist principally of professional and registration fees that are related to the Initial Public Offering. FASB ASC 470-20, “Debt with Conversion and Other Options,” addresses the allocation of proceeds from the issuance of convertible debt into its equity and debt components. The Company applies this guidance to allocate Initial Public Offering proceeds from the Units between ordinary shares and warrants by allocating Initial Public Offering proceeds first to assigned value of the warrants and then to the ordinary shares. Offering costs allocated to the Public and Private Placement Units were allocated to temporary equity and shareholders’ equity, based on the classification of underlying financial instruments.

F-7

Fair Value of Financial Instruments

The fair value of the Company’s assets and liabilities, which qualify as financial instruments under FASB ASC 820, “Fair Value Measurements and Disclosures,” approximates the carrying amount represented in the accompanying balance sheet, primarily due to their short-term nature.

Fair Value Measurements

Fair value is defined as the price that would be received for sale of an asset or paid for transfer of a liability, in an orderly transaction between market participants at the measurement date. U.S. GAAP establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). These tiers include:

	●	Level 1, defined as observable inputs such as quoted prices (unadjusted) for identical instruments in active markets;

	●	Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable such as quoted prices for similar instruments in active markets or quoted prices for identical or similar instruments in markets that are not active; and

	●	Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions, such as valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable.

In some circumstances, the inputs used to measure fair value might be categorized within different levels of the fair value hierarchy. In those instances, the fair value measurement is categorized in its entirety in the fair value hierarchy based on the lowest level input that is significant to the fair value measurement.

Income Taxes

The Company accounts for income taxes under ASC 740, “Income Taxes” (“ASC 740”). ASC 740 requires the recognition of deferred tax assets and liabilities for both the expected impact of differences between the financial statement and tax basis of assets and liabilities and for the expected future tax benefit to be derived from tax loss and tax credit carry forwards. ASC 740 additionally requires a valuation allowance to be established when it is more likely than not that all or a portion of deferred tax assets will not be realized.

ASC 740 also clarifies the accounting for uncertainty in income taxes recognized in an enterprise’s financial statements and prescribes a recognition threshold and measurement process for financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more likely than not to be sustained upon examination by taxing authorities. ASC 740 also provides guidance on derecognition, classification, interest and penalties, accounting in interim period, disclosure and transition.

ASC Topic 740 prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more likely than not to be sustained upon examination by taxing authorities. The Company’s management determined that the Cayman Islands is the Company’s major tax jurisdiction. The Company recognizes accrued interest and penalties related to unrecognized tax benefits as income tax expense. As of October 1, 2025, there were no unrecognized tax benefits and no amounts accrued for interest and penalties. The Company is currently not aware of any issues under review that could result in significant payments, accruals or material deviation from its position.

The Company is considered to be an exempted Cayman Islands company with no connection to any other taxable jurisdiction and is presently not subject to income taxes or income tax filing requirements in the Cayman Islands or the United States. As such, the Company’s tax provision was zero for the period presented.

F-8

Derivative Financial Instruments

The Company evaluates its financial instruments to determine if such instruments are derivatives or contain features that qualify as embedded derivatives in accordance with ASC Topic 815, “Derivatives and Hedging”. For derivative financial instruments that are accounted for as liabilities, the derivative instrument is initially recorded at its fair value on the grant date and is then re-valued at each reporting date, with changes in the fair value reported in the statement of operations. The classification of derivative instruments, including whether such instruments should be recorded as liabilities or as equity, is evaluated at the end of each reporting period. Derivative liabilities are classified in the balance sheet as current or non-current based on whether or not net cash settlement or conversion of the instrument could be required within 12 months of the balance sheet date.

Ordinary Shares Subject to Possible Redemption

The Company accounts for its ordinary shares subject to possible redemption in accordance with the guidance in ASC Topic 480 “Distinguishing Liabilities from Equity.” Ordinary shares subject to mandatory redemption (if any) are classified as a liability instrument and are measured at fair value. Conditionally redeemable ordinary shares (including ordinary shares that feature redemption rights that is either within the control of the holder or subject to redemption upon the occurrence of uncertain events not solely within the Company’s control) are classified as temporary equity. At all other times, ordinary shares are classified as shareholders’ equity. The Company’s ordinary shares feature certain redemption rights that are considered to be outside of the Company’s control and subject to the occurrence of uncertain future events. If it is probable that the equity instrument will become redeemable, we have the option to either (i) accrete changes in the redemption value over the period from the date of issuance (or from the date that it becomes probable that the instrument will become redeemable, if later) to the earliest redemption date of the instrument or (ii) recognize changes in the redemption value immediately as they occur and adjust the carrying amount of the instrument to equal the redemption value at the end of each reporting period. The Company has elected to recognize the changes in redemption value as a charge against retained earnings or, in the absence of retained earnings, as a charge against additional paid-in-capital over an expected 18-month period, which is the initial period that the Company has to complete a Business Combination.

Recent Accounting Pronouncements

In November 2023, the FASB issued Accounting Standards Update (“ASU”) 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures’. The amendments in this ASU require disclosures, on an annual and interim basis, of significant segment expenses that are regularly provided to the chief operating decision maker (“CODM”), as well as the aggregate amount of other segment items included in the reported measure of segment profit or loss. The ASU requires that a public entity disclose the title and position of the CODM and an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and deciding how to allocate resources. Public entities will be required to provide all annual disclosures currently required by Topic 280 in interim periods, and entities with a single reportable segment are required to provide all the disclosures required by the amendments in this ASU and existing segment disclosures in Topic 280. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The Company adopted ASU 2023-07 on June 19, 2024, date of incorporation.

Management does not believe that any other recently issued, but not effective, accounting standards, if currently adopted, would have a material effect on the Company’s financial statement.

Note 3 — Initial Public Offering

On October 1, 2025, the Company sold 5,750,000 Units, which includes the full exercise by the underwriters of their over-allotment option in the amount of 750,000 Units at a price of $10.00 per Unit, generating total gross proceeds of $57,500,000.

Each Unit consists of one Class A ordinary share, par value $0.0001 per share and one right (the “Public Right”). Each Public Right entitles the holder to purchase one-tenth (1/10) of one Class A ordinary share upon the consummation of the Company’s initial Business Combination. The Company will not issue fractional shares. As a result, the holder must hold Public Rights in multiples of 10 in order to receive shares for all of their Public Rights upon closing of a Business Combination.

F-9

Note 4 — Private Placement

Simultaneously with the closing of the Initial Public Offering, the Company consummated the sale of 153,750 Private Placement units, at a price of $10.00 per Private Placement Unit generating gross proceeds of $1,537,500.

The Sponsor, officers and directors have entered into a letter agreement with the Company, pursuant to which they have agreed to (i) waive their redemption rights with respect to their founder shares, private placement shares and public shares in connection with the completion of the initial Business Combination; (ii) waive their redemption rights with respect to their founder shares, private placement shares and public shares in connection with a shareholder vote to approve an amendment to the Company’s amended and restated memorandum and articles of association (A) to modify the substance or timing of the Company’s obligation to allow redemption in connection with the initial Business Combination or to redeem 100% of the public shares if the Company has not consummated an initial Business Combination within the Completion Window or (B) with respect to any other material provisions relating to the rights of holders of ordinary shares or pre-initial Business Combination activity; (iii) waive their rights to liquidating distributions from the Trust Account with respect to their founder shares and private placement shares if the Company fails to complete the initial Business Combination within the Completion Window, although they will be entitled to liquidating distributions from the Trust Account with respect to any public shares they hold if the Company fails to complete the initial Business Combination within the Completion Window and to liquidating distributions from assets outside the Trust Account; and (iv) vote any founder shares and private placement shares held by them and any public shares purchased during or after the Initial Public Offering (including in open market and privately negotiated transactions, aside from shares they may purchase in compliance with the requirements of Rule 14e-5 under the Exchange Act, which would not be voted in favor of approving the Business Combination) in favor of the initial Business Combination.

Note 5 — Related Party Transactions

Founder Shares

On August 27, 2024, the sponsor paid $25,000, or approximately $0.004 per share, to cover certain of our offering costs in exchange for 5,750,000 founder shares (up to 750,000 of which were subject to forfeiture depending on the extent to which the underwriter’s over-allotment option in this offering was exercised). Subsequently, in connection with a reduction in the size of this offering, on April 21, 2025, the 5,750,000 founder shares owned by our sponsor was adjusted, for no additional consideration, to 1,916,667 founder shares (up to 250,000 of which were subject to forfeiture depending on the extent to which the underwriter’s over-allotment option in this offering was exercised). Prior to the consummation of the Initial Public Offering, the sponsors forfeited an additional 825,000 founder shares and the Maxim Individuals and the third-party investors purchased an aggregate of 825,000 founder shares for approximately $0.013 per share.

As of October 1, 2025, there were 1,916,667 ordinary shares issued and outstanding. The underwriter fully exercised the over-allotment option and none of the Founder Shares were subject to forfeiture.

The Sponsor has agreed, subject to limited exceptions, not to transfer, assign or sell any of its Founder Shares until the earlier to occur of: (A) six months after the completion of a Business Combination; and (B) subsequent to a Business Combination, (x) if the last reported sale price of the Class A ordinary shares equals or exceeds $12.00 per share (as adjusted for share sub-divisions, share capitalizations, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after a Business Combination, or (y) the date on which the Company completes a liquidation, merger, amalgamation, share exchange, reorganization or other similar transaction that results in all of the Company’s shareholders having the right to exchange their Class A ordinary shares for cash, securities or other property.

Promissory Note — Related Party

The Sponsor had agreed to loan the Company an aggregate of up to $800,000 to be used for a portion of the expenses of the Initial Public Offering. The loan was non-interest bearing and unsecured. The promissory note was payable on the earlier of December 31, 2025 or the date on which the Company consummates an initial public offering of its securities from amounts available for working capital or from the net proceeds of this offering and the sale of the private placement units not held in the Trust Account. As of October 1, 2025, the Company had borrowed $172,272 under the promissory note and was repaid $172,250. Borrowings under the note are no longer available. As of October 1, 2025, the Company owed the Sponsor $22, shown on the Balance Sheet under Due to Sponsor.

F-10

Due to Sponsor

As of October 11, 2025, the Company owes the Sponsor $10,761 which is non-interest bearing and is due on demand.

Administrative Services Agreement

Commencing on the effective date of the registration statement of the Initial Public Offering, October 1, 2025, the Company has agreed to pay the Sponsor a total of $10,000 per month for office space, utilities and secretarial and administrative support. Upon completion of its initial Business Combination or its liquidation, the Company will cease paying these monthly fees.

Related Party Loans

In order to finance transaction costs in connection with a Business Combination, the Sponsor or an affiliate of the Sponsor, any of their respective affiliates or certain of the Company’s directors and officers may, but are not obligated to, loan the Company funds as may be required (“Working Capital Loans”). If the Company completes a Business Combination, the Company would repay the Working Capital Loans out of the proceeds of the Trust Account released to the Company. Otherwise, the Working Capital Loans would be repaid only out of funds held outside the Trust Account. In the event that a Business Combination does not close, the Company may use a portion of proceeds held outside the Trust Account to repay the Working Capital Loans, but no proceeds held in the Trust Account would be used to repay the Working Capital Loans. Except for the foregoing, the terms of such Working Capital Loans, if any, have not been determined and no written agreements exist with respect to such loans. The Working Capital Loans would either be repaid upon consummation of a Business Combination, without interest, or, at the lender’s discretion, up to $1,500,000 of such Working Capital Loans may be convertible into units at a price of $10.00 per unit. The units would be identical to the Private Placement Units. As of October 1, 2025, there are no Working Capital Loans outstanding.

Note 6 — Commitments and Contingencies

Risks and Uncertainties

The United States and global markets are experiencing volatility and disruption following the geopolitical instability resulting from the ongoing Russia-Ukraine conflict and the recent escalation of the Israel-Hamas conflict. In response to the ongoing Russia-Ukraine conflict, the North Atlantic Treaty Organization (“NATO”) deployed additional military forces to eastern Europe, and the United States, the United Kingdom, the European Union and other countries have announced various sanctions and restrictive actions against Russia, Belarus and related individuals and entities, including the removal of certain financial institutions from the Society for Worldwide Interbank Financial Telecommunication payment system. Certain countries, including the United States, have also provided and may continue to provide military aid or other assistance to Ukraine and to Israel, increasing geopolitical tensions among a number of nations. The invasion of Ukraine by Russia and the escalation of the Israel-Hamas conflict and the resulting measures that have been taken, and could be taken in the future, by NATO, the United States, the United Kingdom, the European Union, Israel and its neighboring states and other countries have created global security concerns that could have a lasting impact on regional and global economies. Although the length and impact of the ongoing conflicts are highly unpredictable, they could lead to market disruptions, including significant volatility in commodity prices, credit and capital markets, as well as supply chain interruptions and increased cyberattacks against U.S. companies. Additionally, any resulting sanctions could adversely affect the global economy and financial markets and lead to instability and lack of liquidity in capital markets.

Any of the above-mentioned factors, or any other negative impact on the global economy, capital markets or other geopolitical conditions resulting from the Russian invasion of Ukraine, the escalation of the Israel-Hamas conflict and subsequent sanctions or related actions, could adversely affect the Company’s search for an initial Business Combination and any target business with which the Company may ultimately consummate an initial Business Combination.

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Registration Rights

The initial shareholders, as the holders of the Founder Shares and Private units, including from time to time the public shares, Private units that may be issued upon conversion of Working Capital Loans, any private shares or Private Placement Warrants included in the Private units, any ordinary shares issuable upon exercise of warrants they may hold or acquire, and any warrants, including Private Placement Warrants, that they may hold or acquire, will be entitled to registration rights pursuant to a registration and shareholder rights agreement signed in connection with the consummation of the Initial Public Offering. The holders of these securities are entitled to make up to three demands, excluding short form demands, that the Company register such securities. In addition, the holders have certain piggyback registration rights with respect to registration statements filed subsequent to the completion of the initial Business Combination. The Company will bear the expenses incurred in connection with the filing of any such registration statements.

Underwriting Agreement

The underwriter was granted a 45-day option from the date of the Initial Public Offering to purchase up to an additional 750,000 units to cover over-allotments, if any.

Additionally, the underwriter was entitled to an underwriting discount of $0.05 per Unit or 0.50%, or 287,500 in the aggregate (including the underwriter’s over-allotment option exercised in full), which was paid at closing. In addition, the underwriter or its designees will receive an aggregate of 230,000 Class A ordinary shares. The Representative’s Units are identical to the Private Placement Units, except that the Representative’s Units will be purchased in a private placement exempt from registration under the Securities Act of 1933, as amended (the “Act”) and will not become freely tradable until after certain conditions are met and the resale of such Representative Units is registered under the Act.

Representative shares

On October 1, 2025, the Company issued 230,000 Representative shares to the underwriter as part of the underwriting compensation. The representative shares have deemed compensation by FINRA and are therefore subject to a lock-up for a period of 180 days immediately following the date of the commencement of sales in this offering pursuant to FINRA Rule 51101(1). Pursuant to FINRA Rule 51101(1), these securities will not be the subject of any hedging, short sale, derivative, put or call transaction that would result in the economic disposition of the securities by any person for a period of 180 days immediately following the commencement of sales in this offering, nor may they be sold, transferred, assigned, pledged or hypothecated for a period of 180 days immediately following the date of the commencement of sales in this offering except to any underwriter and selected dealer participating in the offering and their officers, partners, registered persons or affiliates.

Note 7 — Shareholders’ Equity

Preference Shares — The Company is authorized to issue a total of 1,000,000 preference shares at par value of $0.0001 each. At October 1, 2025, there were no preference shares issued or outstanding.

Class A Ordinary Shares — The Company is authorized to issue 200,000,000 Class A ordinary shares, with a par value of $0.0001 per share. Holders of Class A ordinary shares are entitled to one vote for each share. At October 1, 2025, there were 230,000 Class A ordinary shares issued or outstanding, excluding 5,750,000 shares subject to possible redemption.

Class B Ordinary Shares — The Company is authorized to issue 20,000,000 Class B ordinary shares, with a par value of $0.0001 per share. Holders of the Class B ordinary shares are entitled to one vote for each share. At October 1, 2025, there were 2,070,417 Class B ordinary shares issued and outstanding (see Note 5).

Only holders of Class B ordinary shares will have the right to vote on the election of directors prior to the initial Business Combination. Holders of Class A ordinary shares and holders of Class B ordinary shares will vote together as a single class on all other matters submitted to a vote of the Company’s shareholders except as otherwise required by law.

F-12

The Class B ordinary shares will automatically convert into Class A ordinary shares at the time of a Business Combination or earlier at the option of the holder, on a one-for-one basis, subject to adjustment. In the case that additional Class A ordinary shares, or equity-linked securities, are issued or deemed issued in excess of the amounts issued in the Proposed Public Offering and related to the closing of a Business Combination, the ratio at which the Class B ordinary shares will convert into Class A ordinary shares will be adjusted (unless the holders of a majority of the issued and outstanding Class B ordinary shares agree to waive such anti-dilution adjustment with respect to any such issuance or deemed issuance) so that the number of Class A ordinary shares issuable upon conversion of all Class B ordinary shares will equal, in the aggregate, on an as-converted basis, 25% of the sum of all ordinary shares issued and outstanding upon the completion of the Proposed Public Offering.

Rights

As of October 1, 2025, there were 5,750,000 public rights and 153,750 private rights include in the Placement Units outstanding.

Except in cases where the Company is not the surviving company in a business combination, each holder of a right will receive one-tenth (1/10) of Class A ordinary share upon consummation of the initial business combination. In the event the Company will not be the surviving company upon completion of its initial business combination, each holder of a right will be required to affirmatively convert his, her or its rights in order to receive the one-tenth (1/10) of Class A ordinary share underlying each right upon consummation of the business combination unless otherwise waived in the course of the business combination. No fractional shares will be issued upon exchange of rights. No additional consideration will be required to be paid by a holder of rights in order to receive its additional shares upon consummation of a business combination. Fractional shares will either be rounded down to the nearest whole share or otherwise addressed in accordance with the applicable provisions of Cayman Islands law.

Note 8 — Fair Value Measurements

Fair value is defined as the price that would be received for sale of an asset or paid for transfer of a liability, in an orderly transaction between market participants at the measurement date. US GAAP establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). These tiers include:

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Level 1, defined as observable inputs such as quoted prices (unadjusted) for identical instruments in active markets;

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Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable such as quoted prices for similar instruments in active markets or quoted prices for identical or similar instruments in markets that are not active; and

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Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions, such as valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable.

Note 9 — Segment Information

ASC Topic 280, “Segment Reporting”, establishes standards for companies to report, in their financial statements, information about operating segments, products, services, geographic areas, and major customers. Operating segments are defined as components of an enterprise that engage in business activities from which it may recognize revenues and incur expenses, and for which separate financial information is available that is regularly evaluated by the Company’s CODM, or group, in deciding how to allocate resources and assess performance.

The Company’s CODM has been identified as the Chief Financial Officer, who reviews the assets, operating results, and financial metrics for the Company as a whole to make decisions about allocating resources and assessing financial performance. Accordingly, management has determined that the Company only has one reporting segment.

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The CODM assesses performance for the single segment and decides how to allocate resources based on net income or loss that also is reported on the statement of operations as net income or loss. The measure of segment assets is reported on the balance sheet as total assets. When evaluating the Company’s performance and making key decisions regarding resource allocation, the CODM reviews several key metrics included in total assets, which include the following:

	October 1, 2025
Cash	$	1,015,302
Investments held in Trust Account		57,500,000

Note 10 — Subsequent Events

The Company evaluated subsequent events and transactions that occurred after the balance sheet date through October 7, 2025, the date that the financial statement was issued. Based upon this review, the Company did not identify any subsequent events that would have required adjustment or disclosure in the financial statement.

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StoneBridge Acquisition II Corp 8-K